The Marble Arms .343" Fiber Optic Front Sight features bright green fiber optic technology for enhanced target acquisition and improved accuracy in various lighting conditions.Marble Arms 34-MR Front Sight.343" diameter steel constructionGreen fiber optic glow insert for visibilityDurable steel build for long-lasting performanceCompatible with rifle sight systemsIdeal for hunters and shooters seeking reliable sight performance with enhanced visibility in low-light conditions and quick target acquisition.